1387785025755 has 24 divisors (see below), whose sum is σ = 2532098995920. Its totient is φ = 701196644160.

The previous prime is 1387785025747. The next prime is 1387785025853. The reversal of 1387785025755 is 5575205877831.

1387785025755 is a `hidden beast` number, since 1 + 3 + 8 + 7 + 7 + 8 + 50 + 2 + 575 + 5 = 666.

It is not a de Polignac number, because 1387785025755 - 2³ = 1387785025747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1387785025692 and 1387785025701.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 811569336 + ... + 811571045.

It is an arithmetic number, because the mean of its divisors is an integer number (105504124830).

Almost surely, 2^{1387785025755} is an apocalyptic number.

1387785025755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1387785025755 is a deficient number, since it is larger than the sum of its proper divisors (1144313970165).

1387785025755 is a wasteful number, since it uses less digits than its factorization.

1387785025755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623140411 (or 1623140408 counting only the distinct ones).

The product of its (nonzero) digits is 82320000, while the sum is 63.

The spelling of 1387785025755 in words is "one trillion, three hundred eighty-seven billion, seven hundred eighty-five million, twenty-five thousand, seven hundred fifty-five".